Hi Tom, After scouring the internet for a while now, I still can't find any articles at all on the details of the Taylor circuit.
I found an article by Hoisy from AM Press/Exchange where he refers to W6QYT and W3PHL, and the Taylor super-modulated circuit. http://www.amfone.net/AMPX/65.html Scroll down to "The Super Modulation Audio Processing Group" which is a little before the middle of the issue. Villard worked with various modulation techniques, and he is famous for his involvement in the development of amateur SSB. W3PHL Fred used a high level balanced modulator. (Very high level - 600 watts carrier, 2400 watts audio). I think Hoisy was talking about the ability to transmit negative carrier with a high-level modulated stage, and the ability to modulate beyond 100% negative, but he was also talking about negative cycle loading, and he said something about an FCC limit of 2KW PEP per sideband, so the details may not have been entirely accurate. I also found this page: http://glowbug.port5.com/DSB.html Lots of stuff on balanced modulation from way back when. All of the designs seem to be about completely balancing out the carrier, but the QST article references George Grammer's article, "Practical D.S.B.R.C. Transmitter Design" from QST Maym, 1951, which appears to be about an AM-DSB transmitter that can be run at any level of carrier. There is also Fred W3PHLs article "Modulation Unlimited" from around CQ around 1967. I believe it was a two-part article. He was describing the "upside-down tube" high level balanced modulator, which can be unbalanced for carrier output by applying DC along with the audio. W3DUQ and I also used similar circuits way back when, and K1JJ tried one also. Bacon, WA3WDR ----- Original Message ----- From: "Tom Elmore" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, February 20, 2006 5:19 PM Subject: [AMRadio] W4CJL's Taylor Super Modulation > Does anyone know if the articles that, Don Hoisington W4CJL, wrote about > Taylor Super Modulation still exist today ? I have contacted Electric Radio > magazine about getting some back issues. I would like to get some copies of > his work if it was passed along to somebody after he passed away. > > > > > Thank You > Tom Elmore KA1NVZ > Anchorage, Alaska > > _______________________________________________________ _______ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >
